in washington, boston, newark, and new york's john f. kennedy, airport operations are returning to normal. flightaware estimates 2,800 flights were canceled today, down from a peak of almost 8,000 on monday. tomorrow, 530 flights have been officially scrapped, but that will grow, if as seems likely, laguardia has trouble opening tomorrow. add it up and airlines took a big hit from sandy. >> you can multiply 18,000 canceled flights by a few tens of thousands of dollars in revenue per flight and you're well north of $100 million in lost revenue. some of it they will be able to recover by flying flightmore full over the next week, but a lot of it is gone. >> reporter: if it rolls on the ground, recovery will take longer.mo amtrak is providing limited service south and north of new york. but it gave no estimate for when flooded tunnels will be cleared and service restored into new york's penn station. darren gersh, "n.b.r.," washington. >> sie: the crippled transportation system is a big headache for feiex, joining us paul tronsor. he runs f